<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>员工列表</title>
    <style>
        * {
            margin: 0;
            padding: 0;
        }

        body a {
            text-decoration: none;
            color: #0d3a4b;
        }

        .active {
            color: #ffffff;
        }

        .wrap {
            width: 700px;
            height: 500px;
            background-color: skyblue;
            margin: 0 auto;
            position: relative;
        }

        .wrap #table {
            width: 460px;
            border-radius: 12px;
            position: absolute;
            left: 50%;
            top: 160px;
            transform: translateX(-50%);
            box-sizing: border-box;
            overflow: hidden;
        }

        .wrap #table thead {
            width: 100%;
            height: 30px;
            line-height: 30px;
            text-align: center;
            border-top-left-radius: 12px;
            border-top-right-radius: 12px;
            color: #fff;
            background: #4cbfe5;
        }

        .wrap #table thead a {
            color: #fff;
        }

        .wrap #table tbody {
            color: #19c2ff;
        }

        .wrap #table tbody a {
            color: #19c2ff;
        }

        .wrap #table tbody tr {
            background: #fff;
            text-align: center;
        }

        .ctrl {
            position: absolute;
            left: 200px;
            top: 100px;
        }

        .ctrl div {
            width: 300px;
            line-height: 30px;
            display: flex;
            flex-direction: row;
            justify-content: space-around;
        }

        h1 {
            text-align: center;
            padding-top: 20px;
            color: white;
        }
    </style>
</head>

<body>
    <div class="wrap">
        <h1>员工列表</h1>
        <div class="ctrl">
            <div class="age_sort nu">
                <a href="javascript:;">年龄从小到大</a>
                <a href="javascript:;">年龄从大到小</a>
                <a href="javascript:;" class="active">默认排序</a>
            </div>
            <div class="gender_show">
                <a href="javascript:;">只显示男性</a>
                <a href="javascript:;">只显示女性</a>
                <a href="javascript:;" class="active">默认</a>
            </div>
        </div>
        <table id="table">
            <thead>
                <tr>
                    <th>id</th>
                    <th>姓名</th>
                    <th>年龄</th>
                    <th>性别</th>
                </tr>
            </thead>
            <tbody>
                <tr>
                    <th>0</th>
                    <th>小明</th>
                    <th>24</th>
                    <th>男</th>
                </tr>
            </tbody>
        </table>
    </div>
    <script>
        var data = [
            {
                id: 1,
                name: '小明',
                age: 24,
                gender: '男'
            },
            {
                id: 2,
                name: '小芳',
                age: 30,
                gender: '女'
            },
            {
                id: 3,
                name: '小美',
                age: 31,
                gender: '女'
            },
            {
                id: 4,
                name: '小刚',
                age: 21,
                gender: '男'
            },
            {
                id: 5,
                name: '小琪',
                age: 18,
                gender: '女'
            }
        ];
        
        render(data);
        //1. 根据数据生成tr标签,里面的内容就是数据
        function render(data){
            // 清空tobody数据
            var tbodyEl = document.querySelector('tbody');
            tbodyEl.innerHTML = '';
            // 循环数据,创建数据,添加数据 
            data.forEach(item =>{
                var trEl = document.createElement('tr');
                trEl.innerHTML = `
                    <td>${item.id}</td>
                    <td>${item.name}</td>
                    <td>${item.age}</td>
                    <td>${item.gender}</td>
                `
                // appendChild 后面接的是对象
                // innerHTML 后面接的是字符串
                tbodyEl.appendChild(trEl);
            })
        }
        // 通过全局变量 来记录 年龄筛选按钮 和 性别筛选按钮所在的位置
        let ageIndex = 2; // 记录年龄的按钮位置索引
        let genderIndex = 2; // 记录性别的按钮位置索引
        //2.给每个a绑定点击事件
        dataRander();
        function dataRander(){
            // 获取三个a
            var aEl = document.querySelectorAll('.age_sort a');
            // 声明数组里面的三个函数 
            var sortArr = [data=>JSON.parse(JSON.stringify(data)).sort((a,b)=>a.age - b.age),
            data=>JSON.parse(JSON.stringify(data)).sort((a,b)=>b.age - a.age),
            data=>data,
        ]


            // var sortArr = [function(data){
            // sort 方法进行排序
        //     return JSON.parse(JSON.stringify(data)).sort((a,b)=>a.age - b.age);
        // },function(data){
        //     var res = JSON.parse(JSON.stringify(data));
        //     res.sort(function(a,b){
                // return b.age - a.age
        // }
        //     return res;
        // },function(data){
        //     return data;
        // }]
       


            aEl.forEach(function(item,key){
                item.onclick = function(){
                    // 排他思想
                    aEl.forEach(function(ele){
                        ele.classList.remove("active");
                    })
                    this.classList.add("active");
                    
                    ageIndex = key;
                    // 每点击一个循环a(下标) 就会进入sortArr调用,sort数组里面用sort方法排序
                    var res = sortArr[key](data);
                    var newres = genderArr[genderIndex](res)


                    // 重新渲染数据
                    render(newres);
            }
            })

            var genderEl = document.querySelectorAll('.gender_show a');

            var genderArr =[data=>data.filter(item=>item.gender === '男'),
            data=>data.filter(item=>item.gender === '女'),
            data=>data,
        ]
            // var genderArr = [function(data){
            //     return data.filter(item=>item.gender === '男'); 
            // },function(data){
            //     var res = data.filter(item=>item.gender === '女')
            //     return res;
            // },function(data){
            //     return data;
            // }]

            genderEl.forEach((item,key)=>{
                item.onclick = ()=>{
                    genderEl.forEach((ele,k)=>{
                        if(k === key){
                            ele.classList.add("active");
                        }else{
                            ele.classList.remove("active");
                        }
                    })
                    genderIndex = key;

                    var res = genderArr[key](data);
                    var newres = sortArr[ageIndex](res);
                    render(newres);
                }
            })
        }
    </script>
</body>

</html>